Adding and subtracting machine.



W. SOHOOLING. ADDING AND SUBTRAGTING MACHINE.

APPLICATION FILED HA3. 2, 1909.

Patented Nev. 29, 1910.

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ADDING AND SUBTRAGTING MACHINE.

APPLIOATION FILEDIMAR. 2, 1909.

Patented Nov. 29, 1910.

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ADDING Am) SUBTRACTING MACHINE.

APPLICATION FILED MAR. 2, 1909; 977,333. Patented Nov. 29, 1910.

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ADDING AND SUBTRAGTING MACHINE.

APPLICATION FILED MAR. 2, 1909.

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ADDING AND SUBTRAGTING MACHINE.

APPLIOA'IYION TILED Mm. 2, 1909. Patented NOV 29 1910 J 9 v 14EHEETS-SEEET 5.

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APPLICATION FILED HA3. 2, 1909.

Patented Nov. 29, 1910.

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W. SOHOOLING.

ADDING AND SUBTRAUTING MACHINE.

APPLICATION FILED MAE. 2, 1909.

Patented Nov. 29, 1910.

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Arms? I I I ,UNTTED srn'rns PATENT OFFICE.

WILLIAM SCHOOLING, OF WESTMINSTER, LONDON, ENGLAND, ASSIGNQR TO THESCHOOLING CALCULATING MACHINE COMPANY LIMITED, OF LONDON, ENGLAND.

ADDING AND SUBTRACTING MACHINE.

Specification of Letters Patent. Patented NOV. 29, 1910.

Application filed March 2, 19th). Serial No. 480.975.

To all whom it may concern:

Be it known that -I, W1LLIA2- SCHOOLING, a subject of the King of GreatBritain and Ireland, residing at S]. Page street, \Vestminster, London,S. England, haveinvented certain new and useful Improvements in Addingand Subtracting Machines, of which the following is a specification.

This invention relates to adding and sub tracting machines the objectbeing to prO- vide a machine upon which gross and taro items can besuccessively added and the net automatically indicated, for instance, itis often desirable that the gross, tare and net Weight of coal issuingfrom a colliery in trucks can be rapidly recorded and successive itemsadded without necessitating the usual tedious process of making lists byhand and subtracting the tare items-from the gross in order to obtainthe net.

The invention consists in providing three sets of racks or disksrespectively for gross, tare and net items and in so connecting the setsof racks or (llSKS that when-the gross item is set-upon the gross set ofracks it is simultaneously set on the net set, and then.

when the corresponding tare item is set on the tare set of racks, it isautomatically subtracted from the gross item on the net set of racks,and the result indicated thereon.

The invention also comprises special means for setting the various racksand the combination therewith of indicating totaling and printingmechanism as hereinafter referred to.

In the accompanying drawings, Figure l is a plan of one form of machineaccording to the invention, Fig. 2 being a'plan with the casing'removed.Figs. 3 and L are end elevations. Fig. 5 is a sectional "elevationshowing the gross mechanism, Fig. 6 being a similar view of the netmechanism. Fig. 7 is a rear view of the adding trains various partsbeing removed. 'Figs. 8 and 9 are respectively a plan and reverse-planof the traveling carriage. Fig. 10 is a section of a detaillof thecarrying on mechanism. Fig.

11 is an end sectional elevation of another form of machine wherein thesetting of. the

racks is effected-by a single lever, Fig. 12

' operating .feed mechanism. Fig. 23 is a view of a modiis a plan of themeans employed in the second form of machine for interconnecting thevarious racks. 'Fig. 13 being a view of an segment employed therewith.

Figs. 14 and 15 are right and left hand end .55

elevations respectively. Fig. 16 is a plan with the casing removed. Fig.17 is a sectional end elevation showing a net rack. Fig; 18 isa frontelevation of the carrying ofi or deducting mechanism in detail. Fig.

19 is a sectional end elevation showing one of thetare racks. F ig. 20is a detail view of one of the net racks. Fig. 21 is a detail view ofone st of carrying on mechanism. Fig.

22 is a detail plan of the ribbon and paper fied form of printingmechanism.

In carrying out the invention according to one mode in the applicationto a machine adapted to deal with gross, tare and net .70

weights totaling to thousands of tons a machine is constructed as isillustrated in Figs. 1 to 10. In this machine three sets of circularracks, g g, t t, and n nf, are loosely mounted on a common spindle andrespectively represent the gross, tare and net items. The racks areconveniently mountedloosely on a sleeve, 56, loose on the main spindle,57. Each of the gross and tare racks, g g, t t, is

provided with a lever, 8, by which it can be 8 rotated through more orle degrees according to the item to be set. In order to aid the operatorto accurately set each rack a scale may be provided onthe casing of themachine, opposite to each lever s and a. roller 12, on a lever,13,-"pivoted at 14, is pressed onto the teeth of the rack by a spring,15, (Figs. 5 and 6). Whenan item is set on the gross racks, g y, it isautomatically and simultaneously set on the not set, 11. n, and

then when an item is set on the tare set, If if, this latter item isdeducted from that on the net set so that the diflerence or truenet isset on the net set. This is effected by means of two shafts, b and 0,carried by a traveling carriage, a, (Figs. 8 and 9) and fitted w thpinions adapted to first connect the gross and net sets of racks andthen the tare and net. In order to effect this connection the shaft, 6,is fitted with three pairs of pinions,

pinion, 7c, is at this time in engagement with y A the net tons rack, n,so that this latter is simultaneously set with the gross tons of theitem. The carriage, a, is then allowed to travel forward as hereinafterdescribed; a sufiicient amount tomove the pinions, 72. 7.

out of gear with their racks, g, n, and to. move the pinions, 2 Z, intogear with the racks, g and n. The cwts. of the item are then set on thegross cwts. rack, g, by rotating it through the requisite angle by meansof its lever, s, whereupon the same item is simultaneously set on therack, .12. Both sets of racks, g and n n, are'thus set with the grossitem. The carriage, a, is again movedforward. This time the pinions, h2', is Z, are all out of gear, but the pinions, 0 and q, are broughtinto gear with the tare and net racks, t and a respectively. Thetons ofthe tare item is next set on the rack, t, but as the shaft, 6, is gearedto the shaft, 6, by pinions, e (Z, the pinion, q, rotates the net tonsrack, n, in the reverse direction to that in which it was previouslyrotated and the tare tons are thereby deducted. The carriage, a, is oncemore moved forward so as to throw the pinions, .p and 1', into gear withthe gross and net cwts. racks. The cwts. of

the tare item being set 'on the rack, t, the' same are deducted-from thenet; cwts. rack,

n. The true net is therefore set on the-net;

racks. The three sets of racks, g g, t t, n n, are thus set with thetrue gross, tare and net weights respectively, provided however that thecwts. set on the tare rack, t, have not exceeded the cwt. previously seton the net rack, n, by the gross rack, g. In this case one ton has to bededucted from the net tons rack, n, as hereinafter described. In orderto prevent overrunning of the pin ions when the items are set suitablebrakes are provided for instance, spring detents, 8 and 9, may engagethe pinion, 0 cl, Fig. 5.

The forward movement of the carriage, a, is effected by a spring, -f,the carriage bein released and its movement being lim-' ited y series ofcams, 1, 2, 3, 4, mounted on a shall, o, u. The knob, u, is preferablyengraved with numbers corresponding to the cams to indicatewhich is inits operative position,

and a spring pressed plunger, 10, Fig. t,

engages in corresponding recesses in a collar,

1 1.1, on the shaft, o,-to aid the operator in I ,tion tobe given, eac

accurately determining the amount of rotai time to the. knob. Thecarriage is arrested by a stop, as, which engages-the cams in turn. Itis pressed out by a spring, 3 (Fig. 6,) which allows 1t to reoede whenthe carriage is drawn back,

fitted with an operating knob,

a totaling train as 41, on the end of after each complete operation, bya handle, the stop then sliding over the inclined side of the cam, 1. s1

its will be understood from the foregoing description the knob, u, ispartially rotated after each part of an item is set on the gross andtare racks, the last partial turn bringing the cam, 1, backinto itsinitial position although it is preferred to effect this automaticallyprovidiii the shaft, '1), with a mutilated pinion, 5-, adapted to beengaged by a short toothed segment, 6, rotated by the main operatinghandle, 7, hereinafter referred to.

The racks, g t t, n a, gear. respectively with pinions, 16, 17. 18, 19.20, :21, formed integrally wlth '01 secured to indicating disk-s denotedrespectively by numerals, 22 to 27. In the example shown the racks donot gear directly with the pinions, but indirectly through wheelsindicated by immerals 28 to 33 and each indicating disk bears numerals,0 to 19 on its periphery but obviously those on the tons disk may beincreased when heavier weights or items of greater value are to be dealtwith. In the event of any error being made in the setting of the racksthey may be all returned or cleared to zero-by the rotation of a handle,31, on a spindle, 35, provided with a number of mutilated pinions, 36,adapted to mesh with toothed segments, 37, on the racks the clearingspindle, 35, being normally held by a spring brake, 38, in a positionwherein the gaps in the pinions,- 36, are opposite the ,s egments, 37,so as not to interfere with the settingbf'the racks; The. segments, 37,on the gross and tare racks, g g, t'f, need only have teethcorresponding in number tothe maximum' number of teeth through which theracks are likely to be moved when set, i. (2., in the example shown,that re: quired to indicate 19 tons, 19 cwts. on the indicating disks.

As the net racks, n n, are sometimes rotated through the maximum numberof teeth in one direction and at other times an anal amount in theopposite direction the clearing segments contain more teeth and in theexample shown 'ea'ch net rack has three clearing segments separated bygaps,

-The clearingspindle, 35, is rotated automatically in order toztransfer.each item to hereinafter described by a toothed segment, handle, 7, andadapted to engage a. pinion, the clearing spindle, .35. The pinion, 41,is provided Wlth.

1'20 40, op'erated by the main to prevent operationexcept at therequired time, thepinion .bein partially rotated so at-h of the segment,

as to be brought intot ep few teeth, 44,

40, by a tooth, 43, engaging a atone side of. the gap, .42.-

Q When the tare cwts, of an-item to be set as; i

spindle, 46, this pinion having three pairs,

of teeth, the pairs being separated by gaps."

.A number of trips, as), are provided upon the net cwts. rack, .n,thesetrips being so ar ranged that one of them is always in a position readyto engage the three tooth pinion, 4C7, when the corresponding indicatingdisk, 27, isat zero. In the example shown wherein the net rack, '11 has60 teeth, three trips, 4.9 are arranged at 120 apart. Thus when the netrack is moved backward past the zero position, as occurs when the tarecwts. exceed the gross ewts. in an item one of the trips, 49, moves thepinion, 47, and thereby rotates the pinion, 48, so as to bring 'one pairof teeth of the latter in the path of two teeth, 50, convenientlycarried by a disk, 51, which also carries the clearing segment, 40. Thuswhen the main handle, 7, is revolved the teeth, '50, partially rotatethe pinion, 48, andtherefore the pinion, 45, which moves the net tonsrack a, backward througl'i one tooth. 7

After each item is set on the various racks it is transferred or addedto a totaling mech anismwhich is intermittently brought into gear withthe racks so that the transferring or adding operation can be etl ectedby clearing the racks to zero. The totaling mechanism is convenientlymounted between two end plates, 61, to which sliding bars, 52, aresecured to which in turn links, 53, are connected by screws, '54,passing through slots, 55, intne ends of the main casing. The links, 53,have pins, 102,engaging in cam slots, 103, in cam plates, 104, fixed onthe main spindle, 57, rotated by the main handie, 7. The cam slots, 103,are so shaped and arranged that the totaling mechanism isbrought intoand out of gear with the racks when required. I

The totaling mechanism comprised three sets of wheels for transferringor adding the gross tare and net items to the totaling disks ashereinafter described. Each set of wheels includes two wheels 58 and59representing the cwts. and units of tons and for engaging with therespective cwts. and tons racks and two wheels. 62, 63, representing thetens and hundreds of tons. The four wheels, i58, 59, 62, 63 of each setmesh with intermediate Wheels, 64, 65, 66, 67, which in turn mesh withwheels, 68, 69, 70, 71, on disks, 72, 73, 74, 75, hearing numeralsrepresentin the. totals. The disks, 72 in the example siown bearnumerals 0 to 19 whereas each of the others bears two sets of numerals 0to Each of the wheels, 58, 59, 62, 63, is provided with a brake, thebrakes comprisii g plun 76, mounted between two plates, 77, and providedwith springs, '78. I

The carrying on. from each cwt. wheel, 58, to the corresponding tonswheels, 59, is eil'ected as follows: The boss of the cwts. wheel 58, isprovided with a single tooth, 79, shown in Fig. 5, wherein part of thewheel, 58,'is broken away to expose it to view. This single tooth, 79,once in every revolution of the wheel, 58, partially rotates a mutilatedpinion, 80, having two sets of teeth separated by gaps. At each partialrotation of thepinion, 80, one set of teeth are brought. into the pathof three teeth on a mutilated pinion, 81, on a spindle. 82, which isrotated through one revolution by a segment, S3, lf 3, engaging apinion, 84-, on the spindle, 82, when the" totaling mechanism has beenmoved out of gear with the racks. hen the mutilated pinion, 81, isrotated it rotates the mutilated pinion, 80, through a partialrevolution whereupon one of two diametrically opposite teeth, 85, on theboss of the pinionRO, engages the unit tons wheel. 59, and moves the.latter on through the space of one tooth. Bin identical arrangement isused for carrying on from the tens wheels 62. to the hundreds wheels,63, the parts being similarly lettered in the the drmvings (Fig. 7). All01'? the pinions, 80, and one or the pinions. 81. have a spring brakeordetent. 160, to hold them in their various set positions.

The carrying on from the units tons wheels, 59, to the lens wheels, 62,is not edected directly between these wheels but between theintermediate wheels, and 66, in each case through the medium of pinions,S6, meshing with the wheels. 65, and single teeth, 87, carried by disks.88. Each disk,

88, is loosely mountedv on the boss 89 of a second disk, 90, Fig. 10,.the boss, 89, being screwed to the boss, 91. of the pinion, S6, or beingotherwise secured to the latter. Thus both'the pinion, 86, and the disk,90, are loose on the spindle, 92, but are secured together. One or morescrews or pins. 93, connected to the disk, 88, projects through a slotin the disk, 90, so that a limited relative movement is allowed betweenthe disks, to insurethat the tooth, 87, is moved clear of the wheel, 66,after operating it to prevent said wheel from jamming with the tooth,this movement being resisted during the time that the tooth, 87, ismoving the wheel, 66, onward by a spring, 94, secured. to the screw orpin, 93 and to the disk, 90.

It will be seen from Fig. 5 that the tooth 8'7 is mounted slightly aheadof the corresponding tooth on the pinion, 86, and that when the saidtooth; 87, comes into operation to move the wheel, 66, onward, it ismoved backward, against the action of spring, 1, into the same line asthe tooth or pinion, so, so as to gear with wheel, 66, at the correctmoment the spring Jet, immediately the tooth, 87, has operated thewheel, 66, moving this tooth, S7, to its normal position clear of thewheel, 66, and insuring free movement of same. The totaling mechanism isclez ed to zero when required by means of pinions. 95. inonnted on ashaft, 96, lit-ted with a handle, 97, all the pinions gearing with thewheels, 58. 59, 62, 63, and having gaps adapted to coincide with gaps,98, in the aforesaid wheels when the latter are in thezero or clearedposition. .The clearing shaft, 96, is provided with a spring brake or(letent, 99, adapted to engage in a recess in the shaft to hold it inthe normal or Zero position. It will be understood that after each grossand tare item has been set by meansof the levers, a, all the ensuingoperations are automatically performed when one rotation is given. tothe main handle, 7, the latter being held in its normal position by asuitable spring brake or detent such as 101, adapted to engage in arecess in one of the cam plates. 104, (Fig. at). These operationsperformed by the handle occur in the following Ol't'lCl':'-: ll itemhaving been set on the gross and tare l'ilt'l-IH the handle. 7, isrotated from its normal position (Fig. 3) in the direction of the arrow.First, the segment (3, rotates the pinion. and resets the cam shaft, r,so that the traveling carriage. (I, can move forwardslightly into aninoperative. position ready to be returned for the setting of the nextitem. The teeth, 51), then engage the pinion.

t8, and etl'ect any deduction on the net [on rack if required. The camslots, 103, next draw the totaling mechanism into gear with the racksthis movement being immediately followed by the rotation of the pinion.4:1, on the clearing shaft. 35, by means of the segment. 40. so that theracks are cl ared to zero and the item cleared is transferred or addedto the totaling trains. The totaling mechanism is then pushed back bythe cam slots. 103. and any carrying on required in the totalingmechanism is elfected by the segment. 83, rotating the pinion, 84. afterwhich the spring brake or detent. 101. engages in its rec and retainsthe handle, T, in its normal position of rest.

The whole of the .machine is weferably inclosed in an outer casing. 106.provided with two sets of apertures. 10? and 10S,

through which the correct numerals of the mdicating disks may be seenand also with 1 slots. 10.). for the levers, s. as seen in Fig. 1.Suitable inscriptions may be provided directlyon the c: sing or onplates secured thereto denoting the gross, tare and netdisks. I

hen it is required to make a record 'of loosely ,mounted.

3 the items suitable printing mechanism may be combined with the machinefor instance that described in conjunction with an adding machine in myspecification.

In carrying out the invention according to another mode, instead ofseparately setting each rack directly by means of a lever attachedthereto as in the example above referred to, a single operating lever isused to set all the raclts. For example as illustrated in Figs. 11 to22, a single operating lever, 110, is loosely mounted on a shaft, 111,upon which a single setting wheel, 112, is also The lever, 110, isprovided with a pivoted pawl, 113, held in engagement with the wheel,112, by a spring, 114. A second and reverse pawl, 115, is providedintegral with the pawl, 113, and by means of a lever, 116, the. forwardpawl, 113, can be drawn out of gear and the rearward pawl, 115, thrownin when it is desired to move the setting wheel back for any purpose.

The setting wheel, 112, is adapted to mesh in succession with three longpinions, 117, 118, 119, mounted on three shafts respectively referred tohereinaft r as the reference shaft, 120, the gross shzilft, 121, and thetare shaft, Each of these shafts is in the form of a sleeve mountedloosely on a fixed shaft, such as 123. Fig. 12. Each sleeve is adaptedto travel longitudinally in one. direction under the actionof a spring,12%, when released step by step as hereinafter described. The referenceshaft, 120, is provided \vitl,1 $t pini6ii,125, adapted lie be broughtsuccessively into mesh with a set of circular reference racks, 126, sothat any reference letter, number or indication for instance thereference number of a wagon can beset thereon.

The gross shaft, 121. is provided with two pinions 127, 128, adapted tobe brought simultaneously and successively into engagementwith thecorrespomling raclts of a gross set of racks, 129, and a net set. 130.

The tare shaft, 122, is provided with a pinion, 1 31, adapted to bebrought successively into mesh with the racl s of a tare set of racks.132. Himultaneo v' with this a pinion, 133. is also adapted to bebrought successively into mesh with the net set of racks, 130, thepinion, 1 13, being mounted on a sleeve, 13%. provided with anintermediate and therefore reversing pinion, 13:3, meshing with andadapted to follow up the long pinion, 119,011 the tare sha'l't 122,nnderthe action of a spring. 1331'), a collar, 137, on the pinion, 135,abutting against the end of'the lon pinion, 119.. 'ljlntsavhcn an itemis set on the gross racks, 129, it is also set on the net racks, 130,and when a tare item is set on the tare racks, 132, it is deducted fromthe not set, 130. u

The requisite step by step longitudinal motion of the shafts, 120, 121,122, 1s permitted in correct sequence, after the setting of each digitby stops, 138, arranged in a helical n'ianner on stop shafts 185), thestops engaging and arresting collars, 180, onthe shafts, 120 121, 122,The stop shafts 139, are rotated in correct sequence and through thecorrect amount by 'a toothed segment,

'1-1-0, F 13, which meshes with pinions,

111, onthe ends of the stop shafts. The segi'ncnt, 140, which isretained in each position by a spring pressed plunger, 1 12, is shiftedtooth by tooth bymeans of a pinion, llS, mounted on a shaft, 1441-, Fig.12, upon which is also mounted agf pinion, 115, mesh ing with a pinion,116', which is rotated through the space of one tooth by a pawl 147, onan arm, 14-8 of the operating lever, 110, every time the latter isreturned after each setting operation. The pawl, 147, is pivoted and canmove about its pivot against the action of a spring,'j1 19, when the armmoves forward the pawl then slipping over.

the teeth of the pinion, 1 16. It is prevented from slipping in theother direction by a, stop, 15( The shaft 1 114, is rotated in a reversedirection, when all the racks have been set, by a toothed segment, 151,(Fig. 1 1) rotated by the main handle, 7, the segment, 151, engagingapinion, 152 which through an intermediate pinion, rotates a pinion,154, on the sh: t, 14 1-. When the shaft, 144, is thus reversed itreturns the segment 14:0, and. the latter returns all the stop shafts,139, to their initial positions. The shaft, 144, is held in its normalposition by a spring pressed plunger, 178 Fig. 14.

The shafts, 19.0, 121,- 1 22, are drawn back when required by a plate,155, Fig. 12, attached to a cable, 156, passing over a guide. pulley,157, onto a winding pulley,158,

whiclris rotated'at the correct time by teeth,

159, on a wheel, 160, engaging pinion, 161, connected with the pulle158, FigsflQ and 15. In order, however, to; enable the collars, 180, topass back over the stops, 138, the outer endsof the stop shafts, 139.are mounted in a plate. 163, Fig. 14', which can be dei 1 pressedagainst a spring, 16-1, by a cam, 165, on a wheel, 166; engaging flange,167, on the plate, 163, this depression occurring and lasting when andas long as the shafts, 120, 121, 122, are being drawn back Tn theexample now being described there are five referenceindicating disks,168, Fig. 16, one bearing letters and four bearing numerals although anyother number may be used and may bear any desired cl'iaracters. Thesedisks mesh directly avith the corresponding reference racks. Obviouslyno totaling mechanism is required for these racks or disks- Six racksare used in each of the grosstare and net sets of racks, 2', 0., 21units cwts, a tens ewtsz, and units, tens, hundreds and thousands oftons. Obviously no carrying on mechanism is required between these racksbut as in the first machine described, carrying off or deductingmechanism is required for some of the net racks, to operate when thetare cwts. set on the net racks exceedthe gross cwts. set on the netracks. This. mechanism is required in the present example between theunits cwts, tens. cwts, units tons and tens tons racks. Suitablemechanism is shown in Figs. 17 and 18. It comprises a number of looselymounted pinions, 169, each having 1 ten teeth meshing with the net racksjust referred to, the first three pinions, 169, also having singleteeth, 170, for engaging with pinions, .171, the teeth of which aredivided into two sets by gaps. Each of the pinions, 171, also has asingle tooth, 172, for rotating the next succeeding pinion, 169, throughone tooth. This is effected when one of the pinions, 169, has beenturned backward through a larger number of teeth than in the forwarddirection, which occurs when the tare cwts. set on v the net racksexceed those set by the gross racks. When this takes place the singletooth, 170, trips the corresponding pinion, 171, so as to bring one setof teeth of the latter into the path of the teeth of a mutilated pinion,173, on a shaft, 174. The latter is rotated at the correct time by asegment, 175, Fig. 1 1, engaging a pinion, 17 6,.motion from which istransmitted to. the shaft, 174:, by pinions, 176*, 177. The shaft, 174:,is held after each rotation by a spring pressed plunger, 179: v

The pinion, 169, for the tens cwts. rack is provided not only with asingle tooth, 170 at its-side but a similar tooth, 170, Fig. 18,adjacent to every alternate tooth of the pinion because onehas to bededucted from the tens cwts. rack each time the tare units cwts. exceedsthe gross units cwts. and ob -viously the tens cwts. racks never movemore than one toot-h ata time their indicatirig disks simply bearing thecharacters 0 and 1.

After each item has been set on the various racks in the mannerhereinbefore described it is transferred to totaling mechanism. Thismechanism in the example shown is mounted between end plates, 181, Figs.17 and 19, which are pivoted loosely for convenience 011ashaft,'18?,'"the mechanism being swung about this shaft by means of camslot-s, 103, in which pins or rollers, 102, engage, thelatterbeirigwarried on the ends of links, 183, directly connected to the endplates, 181, y screws, 184, passing through slots in the end plates ofthe main casing, a spring, 185, tending to hold the totaling mechanlsmout of gear.

The totaling mechanism shown. comprises gireo sets of six toothedwheels, 186, each avin for convenience twenty teeth, one set beingprovided for and engaging with the gross, tare and net racksrespectively. Integral with or secured to the side of each wheel, 186,are two carrying teeth, 187, diametrically opposite each other, excepthowever the wheel, 186, correspondmg to the tens cwts. rack which wheelis provided with a carrying tooth, 187, adjacentto every -lternatetooth. A spring brake plunger, 188, engages each wheel, 186. Eachcarrying tooth, 187, engages at the correct time with a nose, 188, on alever, 189, loosely pivoted on a shaft or rod, 190, and having a roundedfree end, 191, which normally rests in a recess, 192, in a lever, 193,pivoted at.19at, and held up by a sprin 195, as.

shown in Figs. 17 and 19. Whenever the lever, 189, is rocked by acarrying tooth,

187, its free end, 191, is shifted into a second recess, 196, in thelever, 193, (Fig. 17) with the result that a pawl, 197, pivoted to thelever 189, is brought into a position wherein its end, 198, can beengaged by a pin, 199, on a. carrying shaft, 200, when the latter isrotated and the end, 198, can be thrust into engagement with the nextsucceeding wheel, 186, to move it forward one tooth. On this forwardmovement of the pawl the lever, 189, is brought back into its normalinoperative position in the recess, The pins, 199, are arranged in ahelical manner on the carrying shaft, 200, in order that the carrying onbetween the wheels, 186, can occur successively. A spring brake plunger,201, engages in a recess in' a collar, 202, on the carrying shaft tohold it in its normal position. The wheels, 186, gear directly withtotals indicating disks, 203, which are arranged below a cover, 201,having apertures, 205, in order that only the correct characters can beseen through the apertures, 206, in the main casing. The carrying shaft,200, is

rotated at he correct time by a toothed seg-' ment, 207, (Fig. 15)engaging an intermediate wheel, 208, meshing with a pinion, 209, on theend of the shaft, 200. i

The totals mechanism can be cleared to zero by turning a handle, 210, ona clearing spindle, 211, (F thereby rotating pinions, 212, (Figs. 17 and19) which rotate intermediate pinions, 213, meshing with the wheels,186. The pinions; 213, have broad teeth whereas the pinions, 212, havenarrow teeth. Each pinion, 213. has av gap extending part way across soas to leave sutiicienttooth. to engage with the wheel, 186, but.insufficient to engage at this point with the pinion. 212, which alsohas a gap which is normally opposite the pinion, 213, so that the pinion212, is not rotated when the totals are being transferred to the wheels,186. The half tooth-on the pinion, 213, is removed in Fig. 19 in orderto show the gap behind it, but itis indicated in dotted lines. The itemsare transferred to the totaling mechanism by clearing the grosstare andnet racks 17, 19' and to zero which is effected by pinions, 214-. Figs.17 and 19, meshing with the racks and mounted on a clearing shaft, 215,which is rotated by a toothed segment, 216, Fig. 15, adapted to engage apinion, 217, on the end of the clearing shaft. This shaft is alsoprovided with a spring brake plunger, 218.

hen it is desired to make a record of the separate items and the totals,a suitable printing mechanism is used, for instance the racks areprovided with extensions, 219, Fig. 19, in which sets of type plunger-s220, are radially arranged. The plungers are provided with returnsprings, 221, and they are so arranged in relation to the teeth on theracks that the type corresponding to the numbers or other charactersindicated by the indicating disks, 168, will be opposite-a platen, 222.The inner ends of the said plungers will-when in this printing positionbe opposite hammer heads, 223, formed on levers, 22st, pivoted on ashaft, 225, and having heels, 226, held by springs, 228, in engagementwith cams, 227, fixed on a shaft, 229. At the correct time the shaft,229, is rotated through half a revolution so that the cams, 227, firstraise the heels, 226, tension the springs, 228, and then suddenlyrelease the heels to allow the springs to bring the hammer heads, 223,against the line of plungers, 2-20, opposite them. The shaft, 229, isrotated by a toothed segment, 230, Fig. 1:"), engaging a pinion, 231,which is fitted with two diametrically opposite single teeth, 232,adapted to engage similar teeth, 233, on a pinion, 234, fixed on theshaft, 229. The pinion, 234,,has two diametrically opposite gaps so thatit can only be turned each time through half a revolution, the shaftbeing retained in each position by a spring brake plunger, 235, thespindle of the pinion, 231, also having a spring brake plunger; 236.Vhen one of the teeth, 232, engages one of the teeth, 233, it rotatesthe pinion 234, sufficiently to bring the normal teeth of the lat' terinto mesh with the normal teeth of the pinion, 231, so that the lattercan rotate it through half a revolution until the gap comes opposite toit.

hen the type plungers are struck by the hammers the type strike aninking ribbon, 237, Figs. 17 and 19, against thepaper web, 238, on theplaten, 222. The web, 238, is fed forward after each item is printed bya tooth, 239, Fig. 15, engaging a'pinion, 240. which through a pinion, 211, partially ro tates a shaft 242, on which the platen, 222, ismounted. The inking ribbon, 237, is fed from one spool, 243, to another,244, Figs. 22, either of which can be put into operation. Each has apinion, 24:5, adapted to be putinto or out of mesh with a correspondingpinion, 246, on a shaft, 247., which can slidelongitudinally. Theshaft,247, is rotated intermittently by the pinion,

